Abstract
Thondaimanaru lagoon is one of the shallow coastal lagoons in Jaffna peninsula. The current study was conducted to assess the present status of water quality and fish species composition of this lagoon. Water sampling was conducted from July 2016 to December 2016. Nine random samples were collected monthly in order to determine water temperature, pH, salinity, Dissolved Oxygen, Total Dissolved Solids and turbidity. A smarTROLL Multi parameter (Insitu 458389) was used to measure all the parameters except turbidity, which was measured by turbidity meter (2100Q HACH). Random samples of fishes were collected once a month. One-way ANOVA was used to perform statistical analysis. Water temperature, Dissolved Oxygen, salinity, Total Dissolved Solids and turbidity showed significant variations (p 0.05) among the months. Chanos chanos, Hemirhamphus sp., Nematalosa nasus, Mugil cephalus, Liza parsia, Oreochromis mossambicus, Arius caelatus and Gerres lucidus were present throughout the study period. Results revealed that the important water quality parameters fluctuated due to seasonal environmental changes where shallow water depth of lagoon, rate of evaporation as well as precipitation had a significant influence on the water quality characteristics.
Highlights
Coastal lagoons are the most productive marine ecosystems in the world due to their location between the land and the sea
All the water samples were analyzed for physico - chemical parameters such as water temperature, pH, salinity, Dissolved Oxygen (DO), Total Dissolved Solids (TDS) and turbidity
Highest mean value of DO was recorded in the month of December (6.75 mg L-1) and lowest mean value was recorded in the month of October (8.46 mg L-1)
Summary
Coastal lagoons are the most productive marine ecosystems in the world due to their location between the land and the sea. They serve as nursery and feeding areas for many continental and marine species (Fiandrino et al, 2003). Thondaimanaru lagoon is one of the coastal lagoon in Jaffna peninsula which is a shallow brackish water body. It is ecologically and economically important due to biological diversity, valuable fish species, water birds, and wildlife resources. Introduction of barrage with sluice gate has an impact on physico - chemical properties of water and fish diversity of lagoon
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
